Cutting device.



W. M. & L. W. SAGAR. GUTTIN G DEVICE.

APPLICATION FILED JULY 23, 1912.

1,095,032. Patented Apr. 28, 1914.

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Leate'rmlyagar 5 4 MW coumulA PLANOGRAPH COUWASHINOTON. n. c.

ITED OFFICE WILLIAM M. SAGAR AND LESTER W. SAGAR, OF BROOKLYN, NEW YORK CUTTING DEVICE.

Specification of Letters Patent.

Patented Apr. 28, 1914.

Application filed. July 23, 1912. Serial No. 711,167.

T) all whom it may concern:

Be it known that we, VVILLIAM M. SA'GAR and Lnsrnn W. SAGAR, citizens of the Umted States, residing at Brooklyn, in the county of Kings and State of New .York, have invented certain new and useful Improve ments in Cutting Devices, of which the following is a specification, reference belng had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in cutting apparatus and is designed particularly for use in cutting down the mica between commutator segments.

The supporting frame is provided with beads serving the double purpose of a grip and as a reinforcement for the frame.

We provide means of adjustment whereby the apparatus is adapted for use in connection with any size of commutator and also make provision for limiting the depth of the cutof the saw.

Other objects and advantages of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

The invention is clearly lllustrated 1n the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in which- Figure 1 is a top plan wlth the cover removed. Fig. 2 is a front elevation showiug the machine in cutting position on a commutator. Fig. 3 is a longitudinalsection as on the line 3-3 of Fig. 1. Fig. 4 is a side elevation showing the cutt ng means. Fig. 5 is a side elevation showing the adjusting means, and F g. 6 is across section on the line mm of Flg. 3 looking in the direction of the arrows. i

Like numerals of reference lndlcate l ke parts throughout the several views.

Referring to the draw1ngs,1-1 designates the main frame preferably provided with a removable top, not shown. Around the edges of the frame is the beading 3 which serves as a grip and also as a re nforcing means for said frame. Extending transversely of this frame there IS a power receiving shaft 4:, mounted 1n the bearings 5-5 and adapted to be lubrlcated by the oil cups 6-6 placed on the said bearings 5-5. Motion is imparted to this shaft by means of a flexible shaft 7 which is connected to the end of said shaft 4 with projections beyond the frame, the shaft 7 deriving power from any suitable source not shown. The point of connection between the ends of these shafts is protected by a suitable guard or housing 8.

Extending from the shaft 4 are the arms 99 substantially parallel with each other and which support a second shaft 10 at their outer ends, which latter shaft is parallel wlth the shaft 4. This shaft 10 is the saw shaft, 11 being the saw which preferably is affixed to said shaft beyond one side of the main frame as seen clearly in Figs. 1, 2 and 6. This shaft is lubricated by the oil cups 5-5 placed on the bearings l -4 of said shaft 10. 11 is a guard for said saw, as seen in Figs. 1 and 2. 12 and 13 are pulleys rigidly affixed to or integral with the shafts 4t and 10 respectively, 14 being a drive belt running over sa1d pulleys, as seen in Figs. 1, 2 and 3, so that when motion is imparted to the power receiving shaft 4 through the medium of the shaft 7, the saw shaft 10 is caused to revolve, thus revolving the cutting saw 11. Any desired tension may be placed upon the belt 14 by the idler 15 and the idler spring 16 on the transverse shaft 16 as shown clearly in Fig. 3. This saw shaft 10, which we term a floating shaft, and the saw 11 are held to their work by the springs 17- 17 which are secured to the inner sides of the frame, their free ends pressing downward upon the arms 9-9, as will be best understood upon reference to Figs. 3, and, when cutting, should the machine happen to encounter an unusually hard substance, these springs will give and allow a sufficient amount of yield, thus taking any strain away from the mechanism and avoiding injury thereto.

To limit the downward movement of the saw shaft and saw, there are secured to the arms 9 the brackets 18-18, as seen in Figs. 1 and 3, through which pass the screws 1919, the ends of which rest upon or bear against the lugs 2020 projecting from the inside of the frame l1. These lugs serve as rests for the saw shaft 10 and permit of varying the depth of the cutof the saw, the saw shaft being raised or lowered as may be required by operating the screws 19-19. Thus, while the springs 17 17 press downward upon the arms 9-9, the lugs 20-20 prevent the shaft from going any lower than desired.

One end of the shaft 10 passes through a vertical, slot 21 on one side of the frame 1-1, as seen in Figs. at and 6, which is of suiflcient height to allow the shaft to be raised or lowered, the shaft being shown in F 6 as in its lowermost position.

In order to permit of the adjustment of the apparatus to any size of comnnitator, there is provided the side piece 2%, seen best in Fig. 2, which is adjustable vertically by means of the slots 24* seen in Fig. 5. It will thus be seen that by raising or lowering this side piece, the device is adapted to fit the commutator which is to be operated upon.

22 in Fig. 2 designates a portion of the commutator. When the apparatus is placed upon a commutator, as shown in Fig. 2, a stop 23 is employed to keep the device from slipping. This stop is adapted to be engaged by the side piece 24, as seen in Fig. 2.

In order to prevent any lateral movement of the saw shaft 10, there is provided the collar 10 as seen in Fig. 6, which is placed on the saw shaft on the outside of one side of the main frame 11, and the arm 9 on the inside of the same side of the frame, the side of the frame being thus clamped between said collar and the arm 9, as will be clearly understood upon reference to said Fig. 6.

With the parts constructed and arranged substantially as hereinbefore described, the operation will be apparent, especially when taken in connection with the annexed drawings. Briefly stated, it is as follows: The stop 23 is placed in position upon the commutator, the side piece 24: is properly adjusted and the saw 11 entered between two segments to operate upon the mica. Power is then applied to the shaft 7 and, consequently, to the shaft 4, and by means of the belt 14 and the pulleys 12 and 13, the saw shaft 10 is actuated to revolve the saw. l Vhen the mica between these two segments has been cut to the required depth, the device is moved to the mica between the next two segments, and so on. As seen in Fig. 2, the mica between the segments to the right of the one upon which the saw is shown as operating. have all been cut. The One to the left of the saw has not yet been operated upon.

What is claimed as new is 1. In a device of the class described, a frame provided with a fixed shaft, and a float-ing shaft. carrying a saw swingingly connected to the fixed shaft, said floating shaft provided with tension springs for forcing the saw downward, said main frame having a slot through which said floating shaft passes.

2. In a device of the class described, a frame provided with a fixed shaft, 21 floating shaft swingingly connected to the fixed shaft and carrying a saw, said floating shaft a slot through which said floating and the screws 24, as

provided with tension springs for forcing the saw downward, said main frame having shaft passes, and means to limit the downward movement of said floating shaft,

In a device of the class described, a frame provided with a fixed shaft, a floating shaft swingingly connected to the fixed shaft and carrying a saw, saidf floating shaft provided with tension springs for forcing the saw downward, said main frame having a slot through which said floating shaft passes, and means for raising and lowering said floating shaft.

4. In a device of the class described, a frame provided with a fixed shaft, a floating shaft swingingly connected to the fixed shaft and carrying a saw, pulleys mounted 011 each shaft, a drive belt connecting the pulleys, tension springs for the floating shaft, said main frame having a slot through which said floating shaftpasses, and means for varying the depth of the saw cut, said means consisting of brackets cxtending from the shaft supporting arms and adjusting means passing through said brackets and resting upon lugs upon the inside of the frame.

5. In a device of the class described, a frame, an extension member secured to one side of said frame, means to hold said extension member in adjusted position, a fixed power-receiving shaft, a guard for said shaft, a floating shaft swingingly connected to the fixed shaft by shaft supportin arms and carrying a saw, a guard for said saw, pulleys cast integral with each shaft, connecting means for the pulleys, tension springs for the floating shaft for forcing said shaft downward, said main frame having a slot through which the floating shaft passes, and means for varying the depth of the saw cut, said means consisting of brackets on the shaft supporting arms, screws passing through said brackets and engaging lugs upon the inside of the frame.

6. In a device of the class described, a frame, grips on said frame, means for varying the width of one side of said frame, a main power-receiving shaft, a guard for said shaft, a floating shaft carrying a saw, a guard for the said saw, arms pivotally connecting the floating shaft to the power receiving shaft, springs pressing downward upon said arms, brackets extending from the said arms, set screws passing through said brackets and resting upon lugs projecting from the inside of the frame, pulleys integral with the fixed shaft and the floating shaft and a drive belt connecting the pulleys.

7. In a device of the class described, a frame, grips on said frame, one side of said frame being adjustable up and down, a main power receiving shaft, a floating shaft carrying a saw, connected to the fixed shaft by and means for transmitting motion from the 10 arms, means for urging said floating shaft power receiving shaft to the floating shaft.

in one direction, and means for varying the In testimony whereof we afiix our sigdepth of the saw out, said means consistnatures, in presence of two witnesses.

ing of brackets upon the shaft supporting WILLIAM M. SAGAR. arms and set screws passing through said i LESTER V. SAGAR. brackets and resting upon lugs upon the Witnesses: inside of the frame, said frame having a GEORGE W. HALLENBEOK, slot through which said floating shaft passes 1 ROBERT J. HANCOCK, Jr.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Iatents, Washington, D. C. 

